Definition

Mean imputation method substitute the given interval of case 2 interval-censored data $(L_{i}, R_{i}]$ with the mean of the interval $Y_{i} = \frac{( L _{i} + R _{i} )}{2}$ if the interval is finite. If $R_{i} = \infty$ , the data $(L_{i}, \infty)$ is substituted with the left value $Y_{i} := L_{i}$ and treated as right-censored data.